Improvement in padlocks



F. W. MIIX. Padlock.

No. 220,637. Patented Oct. 14, 1879.

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UNITED STATES PATENT OFFICE FRANK W. MIX, OF TERRYVILLE, CONNECTICUT.

IMPROVEMENT IN P ADLOCKS.

Specification forming part of Letters Patent N0.'220,637, dated October14, 1879; application tiled June 9, 1879.

To all whom t may concern:

Be it known that I, FRANK W. MIX', of Terryville, in the county ofLitcheld and State of Connecticut, have invented certain new and usefulImprovements in Padlocks, ot` which the following is a specification.

Many ot' the parts shown in this application are also found in anotherapplication ot' even date herewith 5 and so many features of inventionas are common to both applications are intended to be claimed in theother application, thereby making this the subordinate case and theother the foundation one.

My invention, as herein described and claimed, relates more particularlyto a sliding shackle locked at the heel, or both the heel and toe andconsists in the peculiar construction ot' the parts and in theircombinations, as hereinafter described.

In the accompanying drawings, Figure 1 is a side elevation ot a padlockwhich embodies my invention. Fig. 2 is a like view ot the same, with thefront plate removed and the shackle locked. Fig. 3 is a like view ot'the same, with the shackle unlocked. Fig. 4 is a transverse section ot'said lock on line a0 ot' Figs. 1 and 2, and Fig. 5 is a trans-versesection on line y y of said figures.

The lock-case A is divided longitudinally into two parts, which, whentogether, are bored out to receive the key cylinder B of an ordinarypin-tumbler lock. I prefer to divide this ease on one side of themiddle, so that one side will contain a little more than halt' ot' saidcylinder, as shown in Figs. 5 and 6. The position of the pin-tumblers isindicated by broken lines in Fig. 3, but not being new it is consideredunnecessary to describe them.

The key-cylinder B, which also contains pin -tumblers, is provided witha iiat steel ,scroll spring, a, one end of which is secured to the caseand the other to said cylinder, so as to throw the cylinder, whenreleased, into the proper position for the pin-tumblers to lock thecylinder against rotation. A wire spring,

or other ordinary kind of spring, may be substituted for the spring a,if desired.

A short hub, c, of the same size as the cylinder B, extends into thecase a short distance, as shown, which hub is slotted or recessed forthe stop-pin h of cylinder B, the ends of the slot acting as a stop tocheck the cylinder at the proper point for locking it.

One side of the cylinderB has a longitudinal groove, d, Fig. 2, solocated as to be in front of and over the heel ot' the sliding shackle Cwhen the lock is unlocked, and the heel of the shackle has an arm, e,which tits said groove. Said shackle is projected, when released, bymeans of springf, Fig. 3.

The nose of the shackle is locked by a springactuated dog, D, which dogis forced out of engagement by a cam, E, on the upper end otl cylinderB.

W'hen the key-cylinder is locked by its pintumblers, the cani E allowsthe dog to take into the nose of the shackle under the inluence of its,spi-ing, and the arm e on the heel of the sliding shackle enters anotch in the hub c below the slotted portion of thecylinder and under asolid portion thereof, whereby the shackle is locked at both heel andtoe. A proper key inserted within the cylinder releases it when it isturned to the right, and the cam releases or withdraws the dog from thenose of the shackle, and the groove d in the cylinder comes directlyover the arm e. The spring f then throws the shackle outward, the arm epassing upward through the groove l into the position shown in Fig. 3,thereby unlocking the lock, and also holding the cylinder from rotation.By depressing the shackle back into the case the arm e disengages fromthe cylinder, the' spring a returns said cylinder and its cam to itsformerpositon, and the lock is aga-in locked. In this construction thkey cannot be removed when the lock is unlocked.

1t' desired, lthe cam E might be so coupled to the cylinder that thelatter can be turned onefourth of a revolution backward independently ofthe cam, when the key can be withdrawn wit-hout first relocking thelock. Such a connection of the cam with the key-cylinder is shown anddescribed in the other application before referred to.

If the double cylinder is designed for use with the sliding shacklelocking at the heel, the groove fl would be formed in the upper part ofthe cylinder rigid with the cam, and the heel of the shacklecorrespondingly shortened.

If desired, a sliding dog may be substituted for the spring-dog D, andbc operated both ways by the cam E'.

I claim as my invention- 1. In a padlock, a rotating cylinder grooved asat d, in combination with the heel of a sliding shackle, substantiallyas described, and for the purpose specified.

2. In a padlock, the key-cylinder of a pintumbler lock, in combinationwith the sliding shackle and mechanisms acting with said cylinder tolock the shackle at both heel and toe, substantiall y as described, andfor the purpose specified.

3. In a pin-tumbler lock, the combination of the key-cylinder, groovedlongitudinally, the sliding shackle with heel adapted to work in saidgroove, and a spring for turning the cylinder to throw the groovedportion away from the heel so soon as it passes out of the same,substantially as described, and for the purpose specied.

4. In a pin-tumbler lock, the combination of the rotating cylinderhaving a longitudinal groove, the sliding shackle having a heel fittedto work in said groove, and the spring f, for forcing the heel of theshackle into the groove of the cylinder, substantially as described.

5. The combination of the key-cylinder of a pin-tumbler lock, havinggroove d, the sliding shackle having arm e, and the springsa and f,acting on said cylinder and shackle, respectively, substantially asdescribed, and for the purpose specified.

6. The combination of the key-cylinder B, spring a, cam E, dog D,sliding shackle C, and spring f, substantially as described, and for thepurpose specified.

FRANK W. MIX.

Witnesses:

H. B. PLUMB, ELIsIIA MIX.

